/**
 * Created by DONGGAINA on 2019/1/28.
 */
jQuery.fn.extend({
    autoHeight: function () {
        return this.each(function () {
            var $this = jQuery(this);
            if (!$this.attr('_initAdjustHeight')) {
                $this.attr('_initAdjustHeight', $this.outerHeight());
            }
            _adjustH(this).on('input', function () {
                _adjustH(this);
            });
        });

        /**
         * 重置高度
         * @param {Object} elem
         */
        function _adjustH(elem) {
            var $obj = jQuery(elem);
            return $obj.css({height: $obj.attr('_initAdjustHeight'), 'overflow-y': 'hidden'})
                .height(elem.scrollHeight);
        }
    }
});